20293 has 8 divisors (see below), whose sum is σ = 25088. Its totient is φ = 15984.

The previous prime is 20287. The next prime is 20297. The reversal of 20293 is 39202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20293 - 2⁵ = 20261 is a prime.

It is a nialpdrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20297) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21 + ... + 202.

It is an arithmetic number, because the mean of its divisors is an integer number (3136).

2²⁰²⁹³ is an apocalyptic number.

It is an amenable number.

20293 is a deficient number, since it is larger than the sum of its proper divisors (4795).

20293 is a wasteful number, since it uses less digits than its factorization.

20293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 20293 is about 142.4535011855. The cubic root of 20293 is about 27.2760881380.

Adding to 20293 its reverse (39202), we get a palindrome (59495).

It can be divided in two parts, 20 and 293, that added together give a palindrome (313).

The spelling of 20293 in words is "twenty thousand, two hundred ninety-three".